Hey mountain folks, technical question.... I'm Tyvec shopping for a new groundsheet. So is Tyvec 1443/2 R adequate? Its the lighter version than the homewrap stuff that has been commonly used, anyone got any thoughts?

Annnnd while I'm at it, has anyone got any time on the new Thermarest neoairs? Have they finally made a nice quiet mat? (That isn't as hit or miss quality wise as a Nemo Tensor....)